Old Lampasas Dam Modernization
February 2025 Construction Update
Excavation for the Old Lampasas Dam Modernization will be continuing through April. Communities are advised to expect increased noise in the area during regular construction hours.
Completed Tasks:
- Nearly 300 trees and 1,000 cubic yards of boulders were transported to Trevino Park for City playscape use
- To date, 4,500 cubic yards of rock material have been transported to the Watershed Protection Department and Transportation and Public Works Field Operations Department for reuse on other City projects
Upcoming Work:
- Excavation for the dam as well as the principal and auxiliary spillways will continue through April
- A cofferdam will be installed to keep the project site dry during excavation
Project Background
Built in 1984, the Old Lampasas Dam is a high-risk dam that is in poor condition and was significantly damaged during Tropical Storm Hermine in 2010. This project will repair the dam, bring it into compliance with Texas Commission on Environmental Quality (TCEQ) safety regulations, reduce flood risks in the neighborhood, and improve water quality in Bull Creek. Construction for the Old Lampasas Dam Modernization project began in October 2024 and is anticipated to reach substantial completion by spring 2026, weather permitting.
Reminders and Timeline
- The construction site is for authorized personnel only
- City of Austin permitted construction hours are:
- Monday – Friday, 7 a.m. – 7 p.m.
- Saturday, 8 a.m. – 7 p.m.
- The project team will notify neighborhoods in advance of any weekend work
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